NAPA — Offensive tackle Menelik Watson and defensive tackle Pat Sims made it to the practice field Wednesday for the first time during training camp, but neither was around for the finish.

Watson, the second-round draft pick out of Florida State, made about 30 minutes before walking off with trainer Rod Martin after being reinjured in a position drill. He punched a bench in frustration while heading to the weight area, then later found a seat outside the field house, his head down, looking at the ground.

Sims practiced for about 90 minutes before being led off, limping from the field.

After practice ended, Watson stopped for a moment to talk with reporters, his left lower leg in a compression sleeve for what he said was a calf injury.

“This is not the way I planned my first training camp,” Watson said. “I’ve not even took a snap yet. After making good strides in the spring, I wanted to get out there and get on the field.”

Watson’s chances of being a rookie starter are getting more remote with every missed practice.

“He’s a guy that we’re counting on,” coach Dennis Allen said. “He’s a second-round draft choice. He’s got a lot of talent, a lot of potential, but he’s got to be able to be out here. I think he’s as frustrated as any of us too, so it’s not from a lack of effort. But again, we’ll see. I’ll get with Rod and we’ll see where he’s at.”

Sims started practice wearing a wrap around his right thigh just above his knee. He felt good enough to remove it at one point, then shortly afterward was led off the field with a trainer.

Allen wouldn’t rule out Watson or Sims for Friday night’s game against Dallas, although it appears unlikely either would play. The same goes for wide receiver Jacoby Ford, who did not complete practice with an undisclosed injury.

It probably won’t happen against Dallas, but Allen said the Raiders will have someone other than Jon Condo as the long-snapper at some point. The Raiders lost last year’s season opener after Condo was lost to a concussion, an unprepared Travis Goethel was forced into action, and poor snaps led to a blocked punt and another that Shane Lechler couldn’t get off.

Stefen Wisniewski has done some long-snapping, and the Raiders also are working with special teams ace Josh Cribbs.

“At some point in the preseason we’re going to have someone other than Jon Condo snap in a live game situation,” Allen said.

The following players have been ruled out of the Dallas game — linebacker Miles Burris, linebacker D.J. Hayden, linebacker Kaluka Maiava, defensive end Lamarr Houston, linebacker Billy Boyko and defensive lineman Brandon Bair.

Players who returned to practice included cornerbacks Tracy Porter and Mike Jenkins, running back Latavius Murray and wide receiver Connor Vernon, all of whom are expected to be available to face Dallas.

Starters would play about a quarter against Dallas, Allen said, and that includes key veterans such as running back Darren McFadden and free safety Charles Woodson.

“I’ve seen it where guys don’t play in the preseason, and I’ve seen it where guys do,” Allen said. “It’s my feeling that guys need to play.

When assessing McGloin’s current spot at No. 3 on the depth chart ahead of Wilson, Allen said, “I’ve seen a smart, composed guy that throws the ball accurately, makes good decisions, goes to the right place with the ball, he understands protections. And really that’s where he’s kind of separated himself from Tyler, although Tyler’s been a lot better as he’s had a chance to sit back and watch a little bit more.”

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